b. What is the probability that 12 employees will lose more than 9 hours of productivitydue to online social media engagement?P(X >9)Round to four decimal places if necessarywwwSAMSUNGSUBMIT QUESTIONSAVE PROGRESSSUBMIT AS In a growing industry, the mean number of hours of productivity lost by employees perweek due to online social media engagement is 8 hours, with a standard deviation of 2hours.Note: Assume the population data is normally distributed.Standard Normal Distribution Tablea. What is the probability that an employee will lose more than 10 hours of productivitydue to online social media engagement?P(X 10) -SAMSUNGSUBMIT QUESTIONSAVE PROGRESSSUBMIT AS

Given,mean(μ)=8standard deviation(σ)=2

Answered: In a growing industry, the mean number…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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high school studentes across the nation compete in a financial capability challenge each year by taking the national financial capability challenge exam. each student who scored in the top 21 percent are recognized publicly for their acievement by the department of treasury. assuming normal distributions, how many standard deviations above the mean does a stundent have to score to be publicly recognized
A person's blood glucose level and diabetes are closely related. Let x be a random variable measured in milligrams of glucose per deciliter (1/10 of a liter) of blood. Suppose that after a 12-hour fast, the random variable x will have a distribution that is approximately normal with mean = 88 and standard deviation = 21. Note: After 50 years of age, both the mean and standard deviation tend to increase. For an adult (under 50) after a 12-hour fast, find the following probabilities. (Round your answers to four decimal places.) g USE SALT (a) x is more than 60 (b) x is less than 110. (c) x is between 60 and 110. (d) x is greater than 125 (borderline diabetes starts at 125)
The time taken to complete an exam folows a normal probability distribution with a mean of 60 minutes and standard deviation of 10 minutes. What is the probability that a randomly chosen student will complete the exam in 50 minutes or longer?
The lifetime of a 2‑volt non‑rechargeable battery in constant use has a Normal distribution, with a mean of 516 hours and a standard deviation of 20 hours. The proportion of batteries with lifetimes exceeding 520hours is approximately:
Total plasma volume is important in determining the required plasma component in blood replacement therapy for a person undergoing surgery. Plasma volume is influenced by the overall health and physical activity of an individual. Suppose that a random sample of 50 male firefighters are tested and that they have a plasma volume sample mean of x = 37.5 ml/kg (milliliters plasma per kilogram body weight). Assume that ? = 7.20 ml/kg for the distribution of blood plasma.
A normal probability plot suggests the data could come from a population that is normally distributed. A boxplot does not show any outliers. Does the sample evidence suggest that calcium concentrations have changed since 1990? Use the a=0.01 level of significance.
The shelf life of a perishable product is a random variable that is related to customer acceptance and, ultimately, to sales and profit. Suppose the shelf life of a particular soft drink is best approximated by a normal distribution with a mean of 180 days and standard deviation 20 days. What fraction of the product will still be fresh after 5 months on the shelf?

The overhead reach distances of adult females are normally distributed with a mean of 200 cm and a standard deviation of 8.3 cm. Find the probability that an individual distance is greater than 209.30 cm.
TREKLAIR bulbs have an average lifespan of800 hours with a variance of 1,600 hours2 .This duration oflife has a normal distribution. Find the probability that abulb lasts between 778 and 834 hours.
One measure of the risk or volatility of an individual stock is the standard deviation of the total return (capital appreciation plus dividends) over several periods of time. Although the standard deviation is easy to compute, it does not take into account the extent to which the price of a given stock varies as a function of a standard market index, such as the S&P 500. As a result, many financial analysts prefer to use another measure of risk referred to as beta. Betas for individual stocks are determined by simple linear regression. The dependent variable is the total return for the stock and the independent variable is the total return for the stock market. For this case problem we will use the S&P 500 index as the measure of the total return for the stock market, and an estimated regression equation will be developed using monthly data. The beta for the stock is the slope of the estimated regression equation (b1). The data contained in the file named Beta provides the…
Assume that children's IQs (Age 6-12) follow a normal distribution with mean 100 and standard deviation of 12. Find the probability that a randomly selected child has IQ above 118.

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